Tunable cryogenic THz cavity for strong light-matter coupling in complex materials

Abstract

We report here the realization and commissioning of an experiment dedicated to the study of the optical properties of light matter hybrids constituted of crystalline samples embedded in an optical cavity. The experimental assembly developed offers the unique opportunity to study the weak and strong coupling regime between a tunable optical cavity in cryogenic environment and low energy degrees of freedom such as phonons, magnons or charge fluctuations. We describe here the setup developed which allows the positioning of crystalline samples in an optical cavity of different quality factor, the tuning of the cavity length at cryogenic temperatures and its optical characterization with a broadband time domain THz spectrometer (0.2-6 THz). We demonstrate the versatility of the setup by studying the vibrational strong coupling in CuGeO3 single crystal at cryogenic temperatures.

References in corpus (4)

• Extraordinary exciton conductance induced by strong coupling
• Cavity enhanced transport of excitons
• Quantum theory of collective strong coupling of molecular vibrations with a microcavity mode
• Strong coupling in the far-infrared between graphene plasmons and the surface optical phonons of silicon dioxide

Cited by in corpus (13)

• Cavity Quantum Materials
• Cavity-mediated thermal control of metal-to-insulator transition in 1T-TaS${}_2$
• Cavity engineering of solid-state materials without external driving
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• Hybrid THz architectures for molecular polaritonics
• Cavity-mediated coupling of antiferromagnetic spin waves
• Controlling the electro-optic response of a semiconducting perovskite coupled to a phonon-resonant cavity
• Thermal Purcell effect and cavity-induced renormalization of dissipations
• Equilibrium Parametric Amplification in Raman-Cavity Hybrids
• Cavity-Mediated Electron-Electron Interactions: Renormalizing Dirac States in Graphene
• Ultrafast dynamics of a fermion chain in a terahertz field-driven optical cavity
• Dissipation and non-thermal states in cryogenic cavities
• Multimode vibrational coupling across the insulator-to-metal transition in 1T-TaS${}_2$ in THz cavities